323756
Which of the following reagents is used to distinguish phenol and benzoic acid?
1 aq. \(\mathrm{NaOH}\)
2 Tollen's reagent
3 Molisch reagent
4 Neutral \(\mathrm{FeCl}_{3}\)
Explanation:
Neutral \(\mathrm{FeCl}_{3}\) is used to distinguish phenol and benzoic acid. It gives violet colour with phenol and buff - coloured precipitate with benzoic acid.
AIIMS - 2017
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323757
Which of the following carboxylic acid gives tests like aldehydes?
1 \(\mathrm{HCOOH}\)
2 \(\mathrm{CH}_{3} \mathrm{COOH}\)
3 \(\mathrm{EtCOOH}\)
4 None
Explanation:
Due to the presence of aldehyde (-CHO) group in formic acid i.e., It gives test like as aldehydes.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323758
Which acid gives wine red colour with neutral \(\mathrm{FeCl}_{3}\) ?
1 Propanoic acid
2 Acetic acid
3 Formic acid
4 None of these
Explanation:
It is a test for acetate radical.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323759
Propanoic acid undergoes HVZ reaction to give chloropropanoic acid. The product obtained is
1 Stronger acid than propanoic acid
2 As stronger as propanoic acid
3 Weaker acid than propanoic acid
4 Stronger than dichloropropanoic acid.
Explanation:
Propanoic acid undergo HVZ reaction produces 1-chloropropanic acid which is stronger acid than propanoic acid due to electron withdrawing nature of chlorine group.
323756
Which of the following reagents is used to distinguish phenol and benzoic acid?
1 aq. \(\mathrm{NaOH}\)
2 Tollen's reagent
3 Molisch reagent
4 Neutral \(\mathrm{FeCl}_{3}\)
Explanation:
Neutral \(\mathrm{FeCl}_{3}\) is used to distinguish phenol and benzoic acid. It gives violet colour with phenol and buff - coloured precipitate with benzoic acid.
AIIMS - 2017
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323757
Which of the following carboxylic acid gives tests like aldehydes?
1 \(\mathrm{HCOOH}\)
2 \(\mathrm{CH}_{3} \mathrm{COOH}\)
3 \(\mathrm{EtCOOH}\)
4 None
Explanation:
Due to the presence of aldehyde (-CHO) group in formic acid i.e., It gives test like as aldehydes.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323758
Which acid gives wine red colour with neutral \(\mathrm{FeCl}_{3}\) ?
1 Propanoic acid
2 Acetic acid
3 Formic acid
4 None of these
Explanation:
It is a test for acetate radical.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323759
Propanoic acid undergoes HVZ reaction to give chloropropanoic acid. The product obtained is
1 Stronger acid than propanoic acid
2 As stronger as propanoic acid
3 Weaker acid than propanoic acid
4 Stronger than dichloropropanoic acid.
Explanation:
Propanoic acid undergo HVZ reaction produces 1-chloropropanic acid which is stronger acid than propanoic acid due to electron withdrawing nature of chlorine group.
323756
Which of the following reagents is used to distinguish phenol and benzoic acid?
1 aq. \(\mathrm{NaOH}\)
2 Tollen's reagent
3 Molisch reagent
4 Neutral \(\mathrm{FeCl}_{3}\)
Explanation:
Neutral \(\mathrm{FeCl}_{3}\) is used to distinguish phenol and benzoic acid. It gives violet colour with phenol and buff - coloured precipitate with benzoic acid.
AIIMS - 2017
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323757
Which of the following carboxylic acid gives tests like aldehydes?
1 \(\mathrm{HCOOH}\)
2 \(\mathrm{CH}_{3} \mathrm{COOH}\)
3 \(\mathrm{EtCOOH}\)
4 None
Explanation:
Due to the presence of aldehyde (-CHO) group in formic acid i.e., It gives test like as aldehydes.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323758
Which acid gives wine red colour with neutral \(\mathrm{FeCl}_{3}\) ?
1 Propanoic acid
2 Acetic acid
3 Formic acid
4 None of these
Explanation:
It is a test for acetate radical.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323759
Propanoic acid undergoes HVZ reaction to give chloropropanoic acid. The product obtained is
1 Stronger acid than propanoic acid
2 As stronger as propanoic acid
3 Weaker acid than propanoic acid
4 Stronger than dichloropropanoic acid.
Explanation:
Propanoic acid undergo HVZ reaction produces 1-chloropropanic acid which is stronger acid than propanoic acid due to electron withdrawing nature of chlorine group.
323756
Which of the following reagents is used to distinguish phenol and benzoic acid?
1 aq. \(\mathrm{NaOH}\)
2 Tollen's reagent
3 Molisch reagent
4 Neutral \(\mathrm{FeCl}_{3}\)
Explanation:
Neutral \(\mathrm{FeCl}_{3}\) is used to distinguish phenol and benzoic acid. It gives violet colour with phenol and buff - coloured precipitate with benzoic acid.
AIIMS - 2017
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323757
Which of the following carboxylic acid gives tests like aldehydes?
1 \(\mathrm{HCOOH}\)
2 \(\mathrm{CH}_{3} \mathrm{COOH}\)
3 \(\mathrm{EtCOOH}\)
4 None
Explanation:
Due to the presence of aldehyde (-CHO) group in formic acid i.e., It gives test like as aldehydes.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323758
Which acid gives wine red colour with neutral \(\mathrm{FeCl}_{3}\) ?
1 Propanoic acid
2 Acetic acid
3 Formic acid
4 None of these
Explanation:
It is a test for acetate radical.
CHXII12:ALDEHYDES KETONES AND CARBOXYLIC ACIDS
323759
Propanoic acid undergoes HVZ reaction to give chloropropanoic acid. The product obtained is
1 Stronger acid than propanoic acid
2 As stronger as propanoic acid
3 Weaker acid than propanoic acid
4 Stronger than dichloropropanoic acid.
Explanation:
Propanoic acid undergo HVZ reaction produces 1-chloropropanic acid which is stronger acid than propanoic acid due to electron withdrawing nature of chlorine group.
